Aquamist HFS-3 and MINI Tank GB

[Howerton Engineering]

Sorry, you wrote 65/35 w/m in the first post. The ultimate temperature you can cool to is limited by the boiling points of methanol and water. A few general observations we have seen over the years:

Water is less effective at cooling in a humid environment. Methanol works better.

100% water will only cool to about 160F, regardless of ambient.

100% methanol will cool to about 65F in if spraying enough. This will depend on where you temp sensor is in the inlet track and many other variables.

If you have a good IC that is performing a good deal of cooling, there is less heat load available, and the water is a greater hindrance to forcing IAT's lower.

IAT's will be higher in the summer, so spraying the right amount of meth for cooling in summer may be too much in the winter when you IAT's are lower. More liquid methanol will get in the chamber and could cause misfires.

Water helps the in-chamber temp issues, but does not allow IAT's to cool as much as some would like to see.